Superconducting FPGA Nanowire Array With Cryogenic State Control
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Solution Overview
Problem
There is a need for more efficient and effective methods to implement programmable operations in electronic devices, particularly in analog circuits that can operate at cryogenic temperatures and nanoscale sizes, leveraging the properties of superconductors for low-latency operations.
Innovation Solution
The use of superconducting wires in a multi-dimensional array configuration with thermally-coupled heat sources or strain-inducing elements to selectively transition between superconducting and non-superconducting states, allowing for adjustments in capacitance, inductance, and resistance, enabling programmable circuit operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional FPGAs are used to implement programmable operations, then device complexity and manufacturing ease are maintained, but operation speed and energy efficiency deteriorate due to lack of cryogenic operation capability
Solution Approach 1:
The patent changes the operating temperature parameter from room temperature to cryogenic temperatures, enabling superconducting operation of the FPGA circuit elements. This parameter change allows for zero-resistance current flow and dramatically improved operation speed while maintaining reconfigurability through thermal control of the Josephson junctions
Solution Approach 2:
The patent employs composite superconducting structures including Josephson junctions formed with thin-film superconducting materials and insulating barriers. These composite materials enable the circuit to exhibit both superconducting properties for low-loss operation and controllable switching behavior for programmable logic functions
2Use of energy by moving object
If superconducting materials are used to implement analog circuits, then energy efficiency and operation speed improve, but manufacturing precision requirements worsen due to cryogenic temperature requirements
Solution Approach 1:
The patent utilizes the superconducting phase transition of the Josephson junctions to achieve binary switching states. By controlling the thermal state and current through the junctions, the circuit can transition between superconducting (zero resistance) and resistive states, enabling logic operations with minimal energy dissipation and high efficiency
Solution Approach 2:
The patent replaces conventional semiconductor-based switching mechanisms with superconducting Josephson junction switching. This substitution eliminates the need for high-power transistors and reduces energy consumption significantly, as the superconducting switches operate with zero static power dissipation and only require minimal energy for state transitions
3Volume of moving object
If nanoscale superconducting wires are used, then circuit size and integration density improve, but thermal control precision worsens due to small thermal mass
Solution Approach 1:
The patent divides the superconducting circuit into discrete Josephson junction elements that can be individually controlled through separate thermal pathways. Each junction or small group of junctions can be independently heated or cooled through dedicated thermal control lines, allowing precise local temperature management despite the nanoscale dimensions and small thermal mass of individual elements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the effectiveness and efficiency of programmable circuitry by allowing for precise control over the superconducting states of nanowires, enabling efficient operation as capacitors, amplifiers, or other circuit configurations, thereby improving user satisfaction and performance.
Implementation Method 1
Superconductors are materials capable of operating in a superconducting state with zero electrical resistance under particular conditions
Implementation Method 2
each nanowire is thermally-coupled to a gate input
Implementation Method 3
the gate inputs can include strain-inducing elements, such as piezoelectrics and the like, that are physically-coupled to the respective superconducting wires
Data Source
AI summary
The various embodiments described herein include methods, devices, and systems for operating superconducting circuitry. In one aspect, a programmable circuit includes: (1) a superconducting component arranged in a multi-dimensional array of alternating narrow and wide portions, the superconducting component having an input terminal at a first end and an output terminal at a second end opposite of the first end; and (2) control circuitry coupled to the narrow portions of the superconducting component, the control circuitry configured to transition the narrow portions between superconducting and non-superconducting states. In some implementations, the superconducting component and the control circuitry are formed on different layers of the programmable circuit.